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Science project idea on how electroplating and electrotyping are done.
Electroplating and Electrotyping Science Project Idea
How electroplating and electrotyping are done.It will be recalled that in the gravity cell, in which there was a solution of copper sulphate, a layer of copper was deposited on the copper electrode.By this process the electrode was really copper-plated.Copper plate some object such as a piece of tin or nickel as follows. Copper plate Science Experiment Suspend in a jar of copper sulphate the object to be plated, and a piece of copper; connect the former with the negative and the latter with the positive terminal (pole) of a battery. Silver, gold, or nickel plating may be done in a similar way.Name various objects which have been plated with a metal.In each case, state the reason for doing so.
Electrotyping This power of the electric current to cause a layer of metal to be formed on an object is made use of in printing.Nearly all books are printed from electrotype plates.The type is set up and a mold of it is taken in wax.The type may now be taken down and used again.The mold is coated with graphite (a form of carbon) to make it a conductor, and is immersed in a bath of copper sulphate, in which is suspended a piece of pure copper. A current of electricity is now sent through the liquid from the copper to the graphite covered wax plate and in this way a layer of copper is deposited on the wax plate.The wax is replaced then by metal to give strength to the mold.This electrotype plate, which is an exact reproduction of the original page of type, may be conveniently used to print thousands of copies, whereas the type is awkward to handle and soon wears down. In the printing of newspapers a much quicker method is necessary.A machine called the linotype is used.The operator, by manipulating the keys of a keyboard very much as in using the typewriter, sets the type.The type is then pressed against melted metal, and an imprint made which is used in printing the paper. The electric current may also be used in refining metals; those refined in this way being the purest obtainable.
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